Second, like the idea of the angled orientation of the fan, but... Nexus did a terrible job with that as well as the shape of the fins. First they should have placed the fan on the flat side to the fin array and bent the heatpipes another 25 odd degrees. That would improve the airflow to the heatsink and aid cool the mofset HS on the motherboard. Also the “V” shaped dent behind the fan motor is probably a good idea to save some wait without affecting the cooling efficiency. Last but not least the fins on top should be deeper/wider than the once on the bottom. This way the air going through the bottom fins will not warm up to much before it hits the mofset. And to allow for a proper heat distribution over the larger surface of the upper plates the heatpipes should pierce the fin array through the middle. This can be done by having the heatpipes bent at a greater angle than the angle of the fin array. The heatpipes would pierce the fins on an angle and as a side effect the contact surface between the pipes and the fins will increase.
BTW, why did you not test the fan noise? I want to know more about the "World's quietest fan" and what do you make of it.